how it could put your computer at risk. >> niner fever. can you get tickets? and how police are preparing for playoffs. join us for abc 7 news at 11:00 owe oo hope to see you then, san francisco turning red and gold tonight for 49ers check out ferry building. pretty nice, all lit up. >> from all of us here, thanks for joining us. >> see you at 9:00 and 11:00. this is "jeopardy!" here are today's contestants -- a math and drama teacher from fort collins, colorado... ...and our returning co-champion, a performance artist from tallahassee, florida... ...and a strategic analyst for nasa, from huntsville, alabama... and now, here is the host of "jeopardy!" -- alex trebek! thank you, johnny. and welcome, ladies and gentl first time this season we have had co-champions coming back to play. frances, you're the lone challenger today. but i'm not worried about you. you'll do emen. good luck to all three of you. pick up those signaling devices. and we will now go to work with the first round of play. fine.here are the categories. alex: and finally, not national geographi